来自胡舜耕的问题
tan(-11π/4﹚-cos﹙-11π/4﹚的符号?
tan(-11π/4﹚-cos﹙-11π/4﹚的符号?
1回答
2020-12-22 04:59
tan(-11π/4﹚-cos﹙-11π/4﹚的符号?
tan(-11π/4﹚-cos﹙-11π/4﹚的符号?
tan(-11π/4)-cos(-11π/4)
=tan(π/4)+cos(π/4)
=1+√2/2>0